Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
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Change in reading of the scale when putting ball in a container of alcohol
- MatinSAR
- · Replies 18 ·
What is the problem with the units in this state equation of a gas?
- zenterix
- · Replies 12 ·
Finding acceleration of a crate when applying a force at an angle
- Occidomortem
- · Replies 8 ·
Vector addition, trying to find the angle
- Ineedhelpwithphysics
- · Replies 2 ·
Is My Calculation for Bicycle Pump Pressure Incorrect?
- Hak
- · Replies 116 ·
Calculate the following commutator [[AB,iℏ], A]
- chris1223123
- · Replies 3 ·
Golf club 🏌️and ball ⛳ impulse problem
- Clueless_2
- · Replies 19 ·
Efficiency of Energy Transfer in Swimming: Wall Kicking vs. Water Kicking
- dibilo
- · Replies 3 ·
Centripetal force direction confusion
- tellmesomething
- · Replies 16 ·
“Chasing Vertices: A Time-Bound Pursuit Problem in a Square”
- jansons
- · Replies 3 ·
2 pullies and 3 masses -Tension
- Tesla In Person
- · Replies 18 ·
Frames of Reference: Find the speed and heading of the airplane
- ahira
- · Replies 7 ·
What is density of dark matter as a function of distance from the galactic core?
- Lotto
- · Replies 1 ·
How do you calculate the terminal velocity of these two balls?
- algebra topology
- · Replies 45 ·
Derivation of time period for physical pendula without calculus
- danpendr
- · Replies 3 ·
How Do Electron Transitions Correspond to Energy Levels in Quantum Wells?
- sss1
- · Replies 5 ·
How do tides vary over a lunar cycle?
- Hak
- · Replies 40 ·
Potential barrier problem in mechanics
- Rhdjfgjgj
- · Replies 5 ·
Acceleration of a tank leaking water
- guv
- · Replies 2 ·
Calculate center of rotation of monocopter
- user079622
- · Replies 17 ·
Solving 2-D vector along three directions (say at 0,60 and 120 degree)
- Mohmmad Maaitah
- · Replies 13 ·
The Relationship Between Masses and Angles in a Pulley System
- Juanda
- · Replies 29 ·
Solving Orbital Speed with Energy & Angular Momentum Conservation
- Kyuubi
- · Replies 7 ·
What is the mass of the Galaxy's core?
- Lotto
- · Replies 10 ·
Introductory physics: Time for a ball thrown vertically to reach maximum height
- danielsmith123123
- · Replies 4 ·
Transmission cable problem involving power loss
- hendrix7
- · Replies 2 ·
Effect of relative motion on pressure of gas in a container
- Aayush Verma
- · Replies 11 ·
Change in momentum: Child jumping from a swing on a playground
- hendrix7
- · Replies 6 ·
Confusion regarding centripetal acceleration and tangential acceleration
- tellmesomething
- · Replies 13 ·
How Does Angular Momentum Conservation Affect Asteroid Collision Dynamics?
- Hak
- · Replies 335 ·
SUVAT equation question: When will the car collide with the lorry?
- lukegxhycj
- · Replies 18 ·
Is My Calculation of Centripetal Acceleration and Tangential Velocity Correct?
- user079622
- · Replies 12 ·
Hooke's Law using Potential Energy
- JMAMA
- · Replies 21 ·
Forces acting on a box-pulley system in an elevator?
- Sagrebella
- · Replies 33 ·
A loaded railroad car is rolling at a constant velocity
- Alexanddros81
- · Replies 4 ·
Work done during quasi-static, isothermal expansion from P_i to P_f
- zenterix
- · Replies 4 ·
Potential associated with a conservative force field F
- AntonioJ
- · Replies 3 ·
MIT OCW 8.01 PS10.6: A Massive Pulley and a Block on an Incline
- giodude
- · Replies 5 ·
Using Momentum Principle to Find Ratio of Speeds?
- Spooky123
- · Replies 4 ·
Using Momentum, KE and PE to solve this skier velocity problem
- OTSEngineer
- · Replies 13 ·
Newton's Second Law (Pulley Sustem)
- armn91
- · Replies 3 ·
Apparent weight of body immersed in liquid
- brotherbobby
- · Replies 4 ·
How Do I Determine the Center of Mass in This Situation?
- Memo
- · Replies 5 ·
In a constant acceleration motion, Is it possible to have constant speed?
- MatinSAR
- · Replies 11 ·
Is Exponential Form Better for Balloon with Inserted Load Calculation?
- Hak
- · Replies 170 ·
Motion in straight line in bungee jumping
- Kevin98
- · Replies 26 ·
Springs connected to a mass in series?
- flinnbella
- · Replies 56 ·
What is a spring constant of 20 N/m used for?
- DarkEnergy890
- · Replies 18 ·
Finding an application where an air/n-octane mixture is cooled
- dpasini3
- · Replies 1 ·
Why Is Average Thermal Power Not Negative in This Friction Scenario?
- yashboi123
- · Replies 1 ·
Equilibrium Question Involving boat and scale
- Coolcatss
- · Replies 3 ·
Mirror system in geometrical optics
- Hak
- · Replies 9 ·
MIT OCW 8.01 PS11.3: Elastic Collision Between Ball and Pivoted Rod
- giodude
- · Replies 10 ·
Towing two stacked boxes up a ramp
- Sebee_ulg
- · Replies 4 ·
Log-log graph of resistance against temperature for a carbon resistor
- zenterix
- · Replies 12 ·
Questions about a spring-mass system hanging vertically
- emmalyn1997
- · Replies 7 ·
Attempting to teach this: Momentum and Impulse
- Windrose Academy
- · Replies 10 ·
Chrenkov radiation cone angle vs. the speed of the particle
- help I have 12 hours
- · Replies 17 ·
Calculate ideal-gas temperature of a material
- zenterix
- · Replies 2 ·
Questions Regarding a Cat Going Up a Ramp
- mazia
- · Replies 56 ·
Describe how you could use a pith ball as an electroscope
- sarah123
- · Replies 3 ·
IGCSE Pressure Question: How many balloons can be inflated?
- UnknownGuy
- · Replies 8 ·
Method of mirroring - metal plates
- JoelKTH
- · Replies 11 ·
Nuclear Fission Energy and Mass Loss
- resurgance2001
- · Replies 4 ·
How to Analyze the FBD of a Toy Car on the Underside of a Dome?
- bobbeh
- · Replies 2 ·
Calculate magnetic dipole of other planets relative to the Earth
- Kovac
- · Replies 4 ·
Projectile Motion Problem: Kicking a soccer ball over a fence
- salqmander
- · Replies 11 ·
Holonomic constraints and non-holonomic system
- guv
- · Replies 2 ·
Modelling a spring system with damping force and external forces
- sss1
- · Replies 1 ·
Physics problem - Salmon jumping waterfall
- FlowiwGhar
- · Replies 5 ·
Need help with a question on potential difference
- StarlitVarsh
- · Replies 7 ·
A Level: Rearranging Equations into Y = mx + c
- Connor123
- · Replies 14 ·
What Are the Key Equations in Shock Wave Analysis?
- DifferentialGalois
- · Replies 5 ·
Two masses and two pulleys problem
- Mr Davis 97
- · Replies 33 ·
Object A (in free fall) hits object B (ascending with constant velocity)
- groetschel
- · Replies 33 ·
Help with question on motion: Avoiding a rear-end collision
- Physics_is_beautiful
- · Replies 6 ·
Can a sudden blow truly change potential energy?
- Lil123
- · Replies 4 ·
Spring-mediated dipole in a magnetic field
- Hak
- · Replies 31 ·
Falling hailstones hitting two car windscreens
- DifferentialGalois
- · Replies 23 ·
Pulling a block along a surface using a string inclined at an angle
- Memo
- · Replies 3 ·
Is my work correct? (Two students running on a track)
- bekishe004
- · Replies 16 ·
Particle dynamics (mechanics): inclined plane, pulley, two blocks
- Memo
- · Replies 14 ·
Newton's law problem: Pushing 2 stacked blocks on a horizontal table
- JMAMA
- · Replies 13 ·
Very heavy particle collides with a very light particle
- coconut62
- · Replies 11 ·
Finding the position where the electric field is zero
- JohnnyLaws
- · Replies 2 ·
Find the partial diameter error of the surface area of cylinder
- abobik
- · Replies 3 ·
Charge density in sphere that makes constant radial E-field inside
- prosteve037
- · Replies 14 ·
Kinematic car overtake problem: Don’t know what to do...
- Syw
- · Replies 22 ·
Force exerted on block B by Block A when being pushed on a frictionless surface
- yashboi123
- · Replies 3 ·
Question(s) Regarding Magnitude of Force (Window Washer Problem)
- mazia
- · Replies 3 ·
Change in volume of sphere with change in temperature
- MatinSAR
- · Replies 19 ·
Q： Why is it a reversible adiabatic process but not isentropic?
- tracker890 Source h
- · Replies 9 ·
Is the Photoelectric Effect Proof That Light Is a Particle?
- sss1
- · Replies 35 ·
Tension in cable D is equivalent to the tension in cable B?
- yashboi123
- · Replies 8 ·
Sequences of measurements in quantum mechanics
- ellenb899
- · Replies 9 ·
Is the normal force at the top of a rollercoaster loop always directed upwards?
- mancity
- · Replies 5 ·
Foucault Pendulum at the North Pole
- Hak
- · Replies 9 ·
What is the Largest Quantum Number for Li3+ with a 60 Å Orbital Radius?
- hassony
- · Replies 2 ·
Why is momentum equal to mass times velocity?
- logicgate
- · Replies 7 ·